What Happens to the Design When Two More Stories Are Added on Top of an Existing Six Storied Residential Structure in Khulna?

Abstract

The study has been conducted in the Department of Civil Engineering of Daffodil International University, Bangladesh with the objective to prepare a project and thesis with a view to partial fulfillment of the requirements for the degree of Bachelor of Science (B.Sc.) in Civil Engineering. The specific objective of the study is the analysis of residential building considering lateral forces of a six storied structure then compare the deflection caused due to wind loads and earthquake loads and then turning the set structure into eight storied and comparing the differences design and compare the change in deflection in the eight storied structure due to wind load. It was observed that the design of the structure changed in the eight storied structure design and the per floor avg. rebar cost for beams increased by 39% for beams and for columns increased by 75%. Also, the dominating force in both structure was wind due to high exposure and the deflection due to wind was more in 8 storied structure, to be exact 21% in X direction and 134% in Y-direction. The basic methodology adopted here is the sequential presentation of analysis & design of all forces of six storied buildings for earthquake and wind effect by UBC 1994, BNBC 1993, ACI, and code 318R05 code proposed places in Khulna, Bangladesh. Data & figures are presented wherever felt necessary in a reader-friendly way. Analysis and design have been performed with ETABS. The designs of the beam, column, and slab sections were done using AutoCAD.